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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2bda9a6abe1a985ade84fd29109930f32214d9e43f434472430e8f9054b019f8' 
  AND token = 'E0ve3r6qQxaGm+/EsX9PN9jZ/IoyM3KgGb4RKx3QTkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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