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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a554f8b5f2f541eacdb92d1c5d22ef7cc88f9ad97e906ea384f634e554203277' 
  AND token = 'P8vM69YJymfc5H4S889hCDKsNoVrjVwFzo1rSX5P+Bk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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