Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84857fbb4bf1e942c669db8a1886d94048712d28bfec6735fb145293bb5f0e2b' 
  AND token = '6+Y7lrJM2DhJ8KTu1Wd9rrbajQUXABrcY5fRJNBFEZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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