Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '162d129c28b268738d27fd61a616a6885820e0dcd02813dead9c688544366842' 
  AND token = '+yqsk/ACBAi+kbGHit+GuU4MGVAv4CdLYrLulp7+JRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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