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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbc896c8daa31c7eb57018cb21f04456c987257101341fd18c85ea42efb0b712' 
  AND token = '/J5QSjfxiKl11mUtH/7j65ZF790f0a9SHLrSqG5Iuh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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