Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '057f4b5eea7e0d75c3ba55009fbdf5bdb7cd6466a2571141b024c718aac64d24' 
  AND token = 'GsRqJ3OUlsl0tUtYcy3ilLZ54bE4qm6+nPUT9CXJ9iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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