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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85228346d18951720b2490eed017fac0850b8bf6f7ff8d2d22075dbb11e9576c' 
  AND token = 'CaTLTqoKK2G44wnrjFWN6ByDTW9N95wCuhONWyO/bcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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