SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ebc6e4e3bba17a35c63b2edab35c7de79307f153e52f8dfa4a8099f47e06b86' 
  AND token = 'HMCgpm/y22lWNGKcyHLKhju4q/C4BYlpYyKiY1tJ/cM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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