Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f91ffb08c9a3461d0b9aad972d018250681d3245d712dfe298972d3cd8b07020' 
  AND token = 'Ih40fEip3b/WTVkKncNSuxmB2LDhg/glLYR65bRB9hE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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