Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eca99905bfe410e7a66dd83831b1315dd9dd71103ee0d5e626aa06aace390deb' 
  AND token = '7retHDVYYqx7R64uKAy5o4I/xj1pwE+AbVGgSLi211I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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