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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ee055ae31f97450583a49dc9527ba4ae8303e87e02af99f7d984692ddab932d' 
  AND token = 'Ecbir3uWP/1XYynaC15PA1sNO/TYDaO/p3FRKSIJzKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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