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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95125473728236bd125e837f50a771dcf55ed4c7f09bfc2f70229bd31c4a7057' 
  AND token = 'yJEKz1e1Pqy79DGdiF4xl4XQJsDNggUom9QSayD064M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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