Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee798f615521448829faf0a8aadfa169123c46262605d900dcf0658fdd3b185b' 
  AND token = 'rzccZIU34HDHkhmqF9fbd8yWqbCLDSw5l/z80mp2USg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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