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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a2b9ae745db603a42014b64ca4f9d98e95db395ab38e93b5cb90d8e80623b9b' 
  AND token = 'O8hEqTUz3rzRFJ0XeYUfkftMQg+t2nyt1Ba8vChNvOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00120

JSON explain

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