Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '982f20c00d39586e0ac452175d6b6d212fc5149139476a62987ec7659760eb2c' 
  AND token = 'nWKv8/F3m2m0VhvJW+q+S542XozJ8fOYO81MFxJWTa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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