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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3c858e25f683f4a0db3e6c8683ec0d5339708b0f973200ed57c85bb54bf8b3b1' 
  AND token = 'aNAVr1oM7+uJU10bMOYYbL2PuTEKqC6MJKRV/94f/68=' 
  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"
    }
  }
}