Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f9a199dac77cab29d898b960070d22c5039310a961f911d4d2891cafaff629f' 
  AND token = 'bNxqDMKRtgXnViTqJytmlpH/1QG7sC5orybAV0ARgs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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