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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4bb946c22240e43df0c5375ae3daf407b4c5e07604f50e4ddb08e19ef24b859d' 
  AND token = 'eeabpB4Z3P+woJdtwqAN/U1VG+9v0q+IHqgff6inH9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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