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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ac723101f9536e058a9a2ebe1b3e239c2777c2cb4773008b6396213d12a37dd' 
  AND token = 'dI3n4tr5y+zlAogJcR27QAY0f7MgKgwMI2Dtd+8J470=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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