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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '224f50560e677bd18c705bc7ee8385ad9ac27481f45d81d4e7b391c6526a687d' 
  AND token = 'T+2DijXDzzIlHjWC8zAGbFiGZztQUZxRjtF2+gxd+Os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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