Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1351ef93e49169002d43350cc63cf2cdf30829f56c873e64c316fe874f6aed36' 
  AND token = 'HE79sEYCocM+39Tb8oy89TbIVsm0ad9Af7sfNwaHyhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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