Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9931bc58cc653de9997aeb7331c4c6f970f1f4691a7afb000b380c1fe04cd82e' 
  AND token = 'b5NLvW761wFhPBJtl89A5eFukfoHEHDicAjU4sW4FzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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