Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55dfb0e8fd8a93ec25a2f429725fa88bc98eef7917efdd76ef110f1b5b895c26' 
  AND token = '17zh8+5Fa303YS2Bir+2mAlkwklDayYwSbXyGUztDBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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