Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3a3428365d24b64297ebb0b4cc5555d2c8f139946e55c18760f774dda0b0575c' 
  AND token = 'mfXp8s0IN4x7TSZVTi9grZQ+bVls4scsmTZIv+XFQxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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