SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19841cdf4b7f4d31ef8996c3bd8440eb83fa88029e2692b05733f28be234702c' 
  AND token = 'vFFtEjqac5XA0g458khjCZvGSHlnx10VF1CFmROJzL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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