Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3927e3602f2650fd8436929939986be43e2eb1330642d9a1922ae53644d3ee2a' 
  AND token = 'z25vL8keAyOSNl/kniUtPI7kBFdYrhFocEXmVrm5Y7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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