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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '068ba66320e9fc173e48d923f0065f1543b4d368c06dacb9e53f6d1c27ce3c9c' 
  AND token = '8nSseev6wSAqKvy/Eyv3PfhjyrqZC5ApwDBdggEeOik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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