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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6439f5729e81fc244e2ef930a7f3b617ca7c90f5c117c3cb7b4b3286fb849bdd' 
  AND token = 'klaw3GK3FFpXuW05IFsOloqtNTTByvyNUyI5svbI6FM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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