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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dbcf936374a84f5ef39dd825e00cb59348c9f5886ef42094352e190410eeb3b4' 
  AND token = 'df/0bqUp3uIK/Pua4peY8actQ01BUVFinYTEOOZs9iQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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