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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0a5550ca3432586f4c2dfb1ff409a529bcc552ada422f0254c5b23a7e6fa8bcf' 
  AND token = 'biOf0mrUdZzZDLE3WU7vbEjA5H0zllQZPF0nAwQl1Ww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}