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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'aa4d1c5e0e8111662118e5d6dfbbf47f2cc6413570f0440d025a38e2050b64ad' 
  AND token = 'xm9HsRn2UKm9YLpDhbsqA2CBmTEIPrIE1UN5q1SFyXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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