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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bee5c759c75c7cb3c49957412ac03faabe131a3c993be76d8b46668edbc1c0ee' 
  AND token = 'wmEAtZ2A8m27D775CUMX6Q6U6CBrtpDZ+WBBLYLwSic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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