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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba0f3de7e95c3633df74ccdaa2c38f3510aec491b73bafed81bb6cadc290e67d' 
  AND token = 'G19DQP6ExHcRKN1BA0jQQPUrMfok5ZMiyxv3hTOy7Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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