Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd197841f02cd510d676079181621a4d6207b737d7661954cc57a1e6e1c7d68a' 
  AND token = '7jF2bNRTkokFUURCQrazIGxk6UOPv7eVL7Vn7ykZIK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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