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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '605c9dd03ce822d448c2d78b2bc8e31f1f5ee4147be201ce81821dbd5653dbc6' 
  AND token = 'PFA4p7/CfwlVJdIJHpBseJiJRU3vCbmoWl/bf78h7ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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