Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '016afa552a20e89a2380174aa6c7755ab0f068c1208a097beeade0c470171590' 
  AND token = 'iEHLdqygOoB8q5P8wBwnZuNyo3IAqJS8NHnehcl52aY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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