SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d1d9d54241ef11024bcfe552fbf651af388251419417bfa3bbbc87c5ad36704' 
  AND token = 'x+vNEeSkCbXvNwhjWT5HOoylLGqBUQMd4SYHKK70F9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}