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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2b3db5c36b1ee060b2da9cb29e2c70c5f0ed80ae98fec8023d72abad559ac7e9' 
  AND token = '23nrBX35rwQKOkHX4gEnV6w2ZE1Rtav8CpfuMSLJIEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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