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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7406f221fc5c9bfffb950940bf335aa9e178651320d752d81e40b7f6d4a545b6' 
  AND token = 'bvYQXcbqo0TtKb0FGNG9QeE7UkNfMXi20wlOMaCv1PI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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