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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3d9e7e6350f92f7377d49df8d2c6ed81e4fdabbf9e68c234f7b6ca1ce193340' 
  AND token = 'Ge6+rPquQk0I4YLSq12g+fUZPIsI8+N029+r31SZd8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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