SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '746d8dc75fa427b70fa6aaec4be9cf38fb33d8583a13a62e2eb9475ffd6de1c4' 
  AND token = 'zzbZ6ojU/wp8tgjOQcPMM8KPln78lrx0qqiNXvAnMFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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