Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8751a4a946fb1065db608789ee0c78cca1000f47cbd525175f2c65911bc09dc5' 
  AND token = 'GGCMMV8g4jtBhzsFF5AStTZgay5P1UvKotLfATmlZQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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