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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db693b87e9f25a47623c4beb48818a5d18bb7bede6039e7288f4fcdaa92b7cf1' 
  AND token = 'EsgzfAxDJ4pEySmzRBDcUx035UnFGnZB+qNZGEuc9fY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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