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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36f01e6bdc78684bb202acb878f2504788081342ecbf60301f1ac4d3057bdd70' 
  AND token = '0s2d8aGrxveuW3Mv5or9K0tgsZAHcSTcdoXp2drk5xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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