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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4507c229d57ca899c11ef53105dce802cfcedb6059f1e4daef43cd52a61eab98' 
  AND token = 'wvCSwptqEjQ6jr8E9nMkRHSza88CDvAD/85pU/cWyJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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