Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77e1e3a8f259ddfeac92f40b919024f9e5c50e35e37fe5ef6916f9c2a74da466' 
  AND token = 'u/wKS9voTuHARNU/KtneD35dU93WDvA+gV/44VfT8wc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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