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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccd59b3b7d0d5d62e0a7f544aa6ae694aff1141d8e098c8562e884c46a5027ba' 
  AND token = '3OLIoUzjjdibfr+16GO47rbUIssUlkBvl6860YrZoc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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