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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '589654683ef40f7d66f9d1c2c340698f6fe74315f660cc46b077257be8f72814' 
  AND token = '5cGr1IkXqA7EesXbm4UHQ0eqPfczsgrJowTK2do0wqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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