Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c7bfb4ebca56d72682f61a0bd01d08a40a9181ca2a8b115089c9fbd0f29e7e8a' 
  AND token = 'PiK39fhy2SlNPpI42tu6y1ykHNhHxBa3F6F4YMtFYIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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