SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56c75246d311298adaee7fb00a90236e680d4ec9615c7243c73befd91fa95e3b' 
  AND token = 'EpfWi0qxLG/kYhU5vW+kQcAorJWGr8NmFYJThYVNPXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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