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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13a25f6256e198d822a52288e367d5383e9d522d7ae34f4313b7e1a91aac4591' 
  AND token = 'CcWWSUZ3LlDhk+vusN8Zn0zgJW8Y5ECeGqUDrvYgyi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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