Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf47baea7e9d1395c2cbef91a428053cb12a1e2477cad79cbeae392c7543ce88' 
  AND token = '+e+xYEqLgeUSsCZx+vL2/zeXc6CViDLf2RySwVrZox0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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