Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '636864c71be35e9e44882d64c3bc0047621a7bb6668edcbf5aab42fe5f8d9c95' 
  AND token = 'v6X2D6K7lSF4TvCrVWCaLEq5cBkgCKMFqDI8bcGjhTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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