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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f9bb82764d7ff4adb7246c30529ff6bba29be2b560beef2fb14ae8a91c00581' 
  AND token = 'tWMt9MIjF3pMHeM20mKkg64310/KKrQ2vbCgU5AHXRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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