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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7196fc806c99aad49076fd6c9ba27af08f3e95ef16d9f0ad3aed53b30b05cfee' 
  AND token = 'wq8SF64U2tNu66sg4Hp7huF1X/Ve6C02Vx5R+/llaKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}