Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47793725f5e0e624663fe167dac4ef26433000229c07c47c014f50b12829e36f' 
  AND token = 'vZ6Zq1FYWYHgISpsiLmAxIdAsNkRauqbsVv65kzXfi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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