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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '587e5c3593a82c6dd94c2988cecfc6e7bbd211b6638f3dea459b8ba32acaf10a' 
  AND token = 'tpippWMgafotXkgLMEo2vjUmj9m5OrDy8FJCmeKbIU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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