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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '10aae30ea5286307c596bf75f2b35b93b812874c869e955b128fc9c145d2f463' 
  AND token = 'ZDa/5kQy9sJhuAqTHhn4+U/a3d6ajgtxr9rxn5Ddbro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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