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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d1342276f369ef9818d5201e26ed8782d1454104290fdf1c33e6269be9c2aa3' 
  AND token = 'Xb7jpnU9p3TwmoaRplMtf//E75FVcrzt3dSBPwuQQNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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