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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ee5c35d063d5166eea29c4554b8e56e568f714035bcda8c77ab7ff220d8a150' 
  AND token = 'zQPbOKuNOWuD6H0ym8zm2E4kWaC5QKtHboqkPvdYpDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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