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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '133de169fc428ecbfe4a175602a30dd8aa5d28924dd609ed444bf80faab5f9aa' 
  AND token = 'B6ZEIcSOINVBTMXktcxAONvAO9yhbsuFsJBiNtut15A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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