Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ab763a218b730cbbbbff92893f1b9a45e12365c36802c334fea2272b67627be' 
  AND token = 'J1uy1dt2rJuHTUzuYJdmLgPbNugvdLo3GohVdmBWVPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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